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LMR12010XMKE-NOPB

更新时间： 2024-11-05 12:28:35
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
25页 1132K
描述
Input Voltage Range of 3V to 20V, Output Voltage Range of 0.8V to 17V

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LMR12010XMKE-NOPB 数据手册

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LMR12010  
www.ti.com  
SNVS731A –SEPTEMBER 2011–REVISED SEPTEMBER 2011  
®
LMR12010 SIMPLE SWITCHER 20Vin, 1A Step-Down Voltage Regulator in SOT-23  
Check for Samples: LMR12010  
1
FEATURES  
DESCRIPTION  
The LMR12010 regulator is  
a monolithic, high  
23  
•
Input Voltage Range of 3V to 20V  
Output Voltage Range of 0.8V to 17V  
Output Current Up to 1A  
frequency, PWM step-down DC/DC converter in a 6-  
pin Thin SOT-23 package. It provides all the active  
functions to provide local DC/DC conversion with fast  
transient response and accurate regulation in the  
smallest possible PCB area.  
•
•
•
1.6MHz (LMR12010X) and 3 MHz (LMR12010Y)  
Switching Frequencies  
With a minimum of external components and online  
design support through WEBENCH, the LMR12010 is  
easy to use. The ability to drive 1A loads with an  
internal 300mΩ NMOS switch using state-of-the-art  
0.5µm BiCMOS technology results in the best power  
density available. The world class control circuitry  
allows for on-times as low as 13ns, thus supporting  
exceptionally high frequency conversion over the  
entire 3V to 20V input operating range down to the  
minimum output voltage of 0.8V. Switching frequency  
is internally set to 1.6 MHz (LMR12010X) or 3 MHz  
(LMR12010Y), allowing the use of extremely small  
surface mount inductors and chip capacitors. Even  
though the operating frequencies are very high,  
efficiencies up to 90% are easy to achieve. External  
shutdown is included, featuring an ultra-low stand-by  
current of 30nA. The LMR12010 utilizes current-mode  
control and internal compensation to provide high-  
•
•
•
•
•
•
•
Low Shutdown Iq, 30 nA Typical  
Internal Soft-start  
Internally Compensated  
Current-Mode PWM Operation  
Thermal Shutdown  
Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)  
Fully Enabled for WEBENCH® Power Designer  
APPLICATIONS  
•
Point-of-Load Conversions from 3.3V, 5V, and  
12V Rails  
•
•
•
•
•
Space Constrained Applications  
Battery Powered Equipment  
Industrial Distributed Power Applications  
Power Meters  
performance regulation over  
a wide range of  
operating conditions. Additional features include  
internal soft-start circuitry to reduce inrush current,  
pulse-by-pulse current limit, thermal shutdown, and  
output over-voltage protection.  
Portable Hand-Held Instruments  
PERFORMANCE BENEFITS  
•
•
Extremely Easy to Use  
Tiny Overall Solution Reduces System Cost  
D2  
V
BOOST  
SW  
V
IN  
IN  
C3  
D1  
C1  
L1  
V
OUT  
LMR12010  
ON  
C2  
EN  
R1  
OFF  
FB  
GND  
R2  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011, Texas Instruments Incorporated  
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